Subject: [PATCH 2/2] gitignore.txt: clarify recursive nature of excluded directories

From: Karsten Blees <[email-masked]>
Date: Thu, 07 Nov 2013 17:31:36 +0100

Additionally, precedence of negated patterns is exactly as outlined in
the DESCRIPTION section, we don't need to repeat this.

Signed-off-by: Karsten Blees <[email-masked]>
---
 Documentation/gitignore.txt | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/Documentation/gitignore.txt b/Documentation/gitignore.txt
index f971960..5ecc48e 100644
--- a/Documentation/gitignore.txt
+++ b/Documentation/gitignore.txt
@@ -79,8 +79,9 @@ PATTERN FORMAT
 
  - An optional prefix "`!`" which negates the pattern; any
    matching file excluded by a previous pattern will become
-   included again.  If a negated pattern matches, this will
-   override lower precedence patterns sources.
+   included again. It is not possible to re-include a file if a parent
+   directory of that file is excluded (i.e. excluding a directory
+   will recursively and irrevocably exclude the entire content).
    Put a backslash ("`\`") in front of the first "`!`" for patterns
    that begin with a literal "`!`", for example, "`\!important!.txt`".
 
@@ -182,6 +183,19 @@ Another example:
 The second .gitignore prevents Git from ignoring
 `arch/foo/kernel/vmlinux.lds.S`.
 
+Example to exclude everything except a specific directory `foo/bar`
+(note the `/*` - without the slash, the wildcard would also exclude
+everything within `foo/bar`):
+
+--------------------------------------------------------------
+    $ cat .gitignore
+    # exclude everything except directory foo/bar
+    /*
+    !/foo
+    /foo/*
+    !/foo/bar
+--------------------------------------------------------------
+
 SEE ALSO
 --------
 linkgit:git-rm[1],
-- 
1.8.4.msysgit.0.12.g88f5ed0